Patents by Inventor David E. Godfrey

David E. Godfrey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4143552
    Abstract: The frequency response of the cutting tool of a coal mining machine is monitored at a resonant frequency of the cutting tool, using a vibration transducer mounted on a non-rotating support arm, to detect the difference between coal and rock or other enclosing material. The horizon control sensor maintains the mining machine within the undulating coal seam.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: March 13, 1979
    Assignee: General Electric Company
    Inventor: David E. Godfrey
  • Patent number: 4115915
    Abstract: A method for fabricating an electric machine stator core and winding assembly characterized by insulated sectionalized coils suitable for automatic fabrication and assembly. Bundles of straight coil side wires are externally insulated and inserted longitudinally into the stator slots, and the coil end turns are manufactured separately as planar arrays of printed circuit conductors or discrete wires adhered to end cap insulating boards. Upon stacking the boards against each stator core end face, the aligned coil end turns and sides are selectively joined to form a continuous winding. The objective is lower cost wound stators for small and medium ac and dc motors.
    Type: Grant
    Filed: May 11, 1977
    Date of Patent: September 26, 1978
    Assignee: General Electric Company
    Inventor: David E. Godfrey
  • Patent number: 4062229
    Abstract: The bond integrity of resin grouted rock bolts or roof bolts anchored within the ceiling in underground mines is tested by inducing broadband vibrations and measuring the resonant frequencies of the axial and transverse vibration modes. Voids in the resin grout or imperfect bonding cause shifts in the resonant frequencies. The tension in expansion nut rock bolts is determined from the resonant frequency of the transverse vibration mode.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: December 13, 1977
    Assignee: General Electric Company
    Inventors: David E. Godfrey, Norman R. Kuchar